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Why do we need packet sniffer?
With a packet sniffer, sometimes also called packet analyzer, network administrators can monitor their network traffic and gain valuable insights about their infrastructure and its performance. It allows them to measure the traffic flow in a network and also identify which applications are using the maximum bandwidth.
Which software is used for packet sniffing?
WireShark is a widely-used network protocol analyzer that lets you monitor every detail about your network and the packet flow going through it. Wireshark is completely free and easy to use as well as provide features like customizable reports, advanced triggers, filtering and alerts.
What kind of sniffer do I need for 802.11?
Typically in the 802.11b/g (2.4GHz) environment, using a three channel sniffer may be required. This involves using 3 Wireless adapters on your sniffing device, with each one set to channel 1, 6 and 11. Using USB wireless adapters works best for this type of setup.
What kind of adapter do I need for sniffing device?
This involves using 3 Wireless adapters on your sniffing device, with each one set to channel 1, 6 and 11. Using USB wireless adapters works best for this type of setup. Step 4: If you are troubleshooting 5GHz, then the number of channels will dramatically increase.
How does a wireless sniffer work for a client?
Step 1: Since the sniffing device, client device and AP are all using RF generating radios for transmission or reception, it helps to have your wireless sniffer close to your target device (the client machine). This will allow your sniffing device to capture a good approximation of what your client device is hearing over the air.
How to perform a wireless packet capture using tcpdump?
To perform a wireless packet capture using tcpdump: first set the channel using the airport utility as shown above then perform a wireless packet capture, saving to a file. When done, type Control/C to exit.